Ha, just a month or two ago I was asking one of the local experts about the exact same thing. It got so technical that he advised me to continue my enquiries w

Ha, just a month or two ago I was asking one of the local experts about the exact same thing. It got so technical that he advised me to continue my enquiries with the astronomers at the Royal Observatory. Unfortunately it was a Saturday morning and, as you know, they were all in bed after yet another crazy all nighter.